<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>
            Hello World!
        </title>
        <style>
            h1 {
                color: green;
                font-size: 30px;
            }
        </style>
        <!-- <link rel="shortcut icon" href="favicon.ico" type="image/x-icon">-->
        <!-- href:reference(超链接)-->
        <link rel="icon" href="https://www.jd.com/favicon.ico">
    </head>
    <body>
        <h1>
            Welcome to the real world!
        </h1>
        <p>
            It sucks.You're gonna love it!
        </p>
    </body>
</html>